| 塔里木克拉通北缘的前寒武纪构造热事件——新疆库尔勒铁门关高级变质岩的锆石U-Pb年代学限定 |
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| 引用本文： | 董昕,张泽明,唐伟.塔里木克拉通北缘的前寒武纪构造热事件——新疆库尔勒铁门关高级变质岩的锆石U-Pb年代学限定[J].岩石学报,2011,27(1):47-58. |
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| 作者姓名： | 董昕 张泽明 唐伟 |
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| 作者单位： | 中国地质科学院地质研究所,北京 100037;中国地质科学院地质研究所,北京 100037;内蒙古矿业开发有限责任公司,呼和浩特 010020 |
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| 基金项目： | 本文受国家自然科学基金项目(40921001)、中石化集团前瞻性研究项目(YPH08110)和中国地质调查局基础研究项目(1212010610105)联合资助. |
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| 摘 要： | 本文对位于塔里木盆地北缘库尔勒铁门关地区高级变质岩中的锆石进行了U-Pb年代学研究。研究结果表明,铁门关地区的变质岩由片麻岩、片岩、角闪岩和钙硅酸盐组成,普遍经历了角闪岩相变质作用,矿物组合为斜长石+钾长石+石英+黑云母±白云母±角闪石±石榴石。锆石U-Pb定年分析揭示出三期构造热事件:古元古代早期(~2370Ma)的岩浆事件、古元古代晚期(1890~1850Ma)的变质事件,和新元古代早期(980~910Ma)变质事件。这些结果为塔里木克拉通的前寒武纪构造演化提供了新的限定。
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| 关 键 词： | 塔里木克拉通 前寒武纪构造演化 高级变质岩 锆石U-Pb年代学 |
| 收稿时间： | 5/5/2010 12:00:00 AM |
| 修稿时间： | 2010/12/6 0:00:00 |
Precambrian tectono-thermal events of the northern margin of the Tarim Craton: Constraints of zircon U-Pb chronology from high-grade metamorphic rocks of the Korla, Xinjiang |
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| DONG Xin,ZHANG ZeMing and TANG Wei.Precambrian tectono-thermal events of the northern margin of the Tarim Craton: Constraints of zircon U-Pb chronology from high-grade metamorphic rocks of the Korla, Xinjiang[J].Acta Petrologica Sinica,2011,27(1):47-58. |
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| Authors: | DONG Xin ZHANG ZeMing and TANG Wei |
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| Institution: | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Inner Mongolia Mining Exploitation Co.LTD, Huhhot 010020, China |
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| Abstract: | Zircon U-Pb chronology of high-grade metamorphic rocks from the northern margin of the Tarim Craton, was reported in this paper. The metamorphic rocks located on the Tiemenguan of northern Korla, was composed of gneiss, schist, amphibolite and calc-silicate rocks. They have mineral assemblages of plagioclase+K-feldspar+quartz+biotite±muscovite±hornblende±garnet, indicating amphibolite-facies conditions. The zircon U-Pb dating demonstrates that these high-grade metamorphic rocks have been subjected to three-stages of tectono-thermal events, i.e. the Early Paleoproterozoic magmatic event of ~2370Ma, the Late Paleoproterozoic metamorphic event of 1890~1850Ma and the Early Neoproterozoic metamorphic event of 980~910Ma. These results supply significant constrains on Precambrian tectonic evolution of Tarim Craton. |
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| Keywords: | Tarim Craton Precambrian tectonic evolution High-grade metamorphic rocks Zircon U-Pb chronology |
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